81030185276 has 6 divisors (see below), whose sum is σ = 141802824240. Its totient is φ = 40515092636.

The previous prime is 81030185261. The next prime is 81030185281. The reversal of 81030185276 is 67258103018.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10128773156 + ... + 10128773163.

It is an arithmetic number, because the mean of its divisors is an integer number (23633804040).

Almost surely, 2^81030185276 is an apocalyptic number.

It is an amenable number.

81030185276 is a deficient number, since it is larger than the sum of its proper divisors (60772638964).

81030185276 is a wasteful number, since it uses less digits than its factorization.

81030185276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20257546323 (or 20257546321 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 41.

The spelling of 81030185276 in words is "eighty-one billion, thirty million, one hundred eighty-five thousand, two hundred seventy-six".